package com.sky.service.impl;

import com.alibaba.fastjson.JSON;
import com.alibaba.fastjson.JSONObject;
import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.github.xiaoymin.knife4j.core.util.CollectionUtils;
import com.sky.constant.MessageConstant;
import com.sky.context.BaseContext;
import com.sky.dto.*;
import com.sky.entity.*;
import com.sky.exception.AddressBookBusinessException;
import com.sky.exception.OrderBusinessException;
import com.sky.exception.ShoppingCartBusinessException;
import com.sky.mapper.*;
import com.sky.result.PageResult;
import com.sky.service.OrderService;
import com.sky.utils.WeChatPayUtil;
import com.sky.vo.OrderPaymentVO;
import com.sky.vo.OrderStatisticsVO;
import com.sky.vo.OrderSubmitVO;
import com.sky.vo.OrderVO;
import com.sky.websocket.WebSocketServer;
import lombok.extern.slf4j.Slf4j;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.core.annotation.Order;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service
@Slf4j
public class OrderServiceImpl implements OrderService {
    @Autowired
    private OrderMapper orderMapper;
    
    @Autowired
    private OrderDetailMapper orderDetailMapper;
    
    @Autowired
    private AddressBookMapper addressBookMapper;
    
    @Autowired
    private ShoppingCartMapper shoppingCartMapper;
    
    @Autowired
    private UserMapper userMapper;
    
    @Autowired
    private WeChatPayUtil weChatPayUtil;
    @Autowired
    private WebSocketServer webSocketServer;
    
    
    /**
     * 用户下单
     *
     * @param ordersSubmitDTO
     * @return
     */
    @Transactional
    @Override
    public OrderSubmitVO submitOrder(OrdersSubmitDTO ordersSubmitDTO) {
        // 地址为空，不允许下单
        AddressBook addressBook = addressBookMapper.getById(ordersSubmitDTO.getAddressBookId());
        // 抛异常
        if (addressBook == null) {
            throw new AddressBookBusinessException(MessageConstant.ADDRESS_BOOK_IS_NULL);
        }
        // 购物车没商品，不允许下单
        Long userId = BaseContext.getCurrentId();
        ShoppingCart shoppingCart = new ShoppingCart();
        // 查询当前用户的购物车数据
        shoppingCart.setUserId(userId);
        List<ShoppingCart> shoppingCartList = shoppingCartMapper.list(shoppingCart);
        // 抛异常
        if (shoppingCartList == null && shoppingCartList.isEmpty()) {
            throw new ShoppingCartBusinessException(MessageConstant.SHOPPING_CART_IS_NULL);
        }
        
        //构造订单数据
        Orders order = new Orders();
        BeanUtils.copyProperties(ordersSubmitDTO, order);
        order.setPhone(addressBook.getPhone());
        order.setAddress(addressBook.getDetail());
        order.setConsignee(addressBook.getConsignee());
        order.setNumber(String.valueOf(System.currentTimeMillis()));
        order.setUserId(userId);
        order.setStatus(Orders.PENDING_PAYMENT);
        order.setPayStatus(Orders.UN_PAID);
        order.setOrderTime(LocalDateTime.now());
        
        //向订单表插入1条数据
        orderMapper.insert(order);
        
        
        List<OrderDetail> orderDetailList = new ArrayList<>();
        // 向订单明细表插入n条数据
        for (ShoppingCart cart : shoppingCartList) {
            OrderDetail orderDetail = new OrderDetail();
            BeanUtils.copyProperties(cart, orderDetail);
            orderDetail.setOrderId(order.getId());
            orderDetailList.add(orderDetail);
        }
        //向明细表插入n条数据
        orderDetailMapper.insertBatch(orderDetailList);
        
        //清理购物车中的数据
        shoppingCartMapper.deleteByUserId(userId);
        
        //封装返回结果
        OrderSubmitVO orderSubmitVO = OrderSubmitVO.builder()
                .id(order.getId())
                .orderNumber(order.getNumber())
                .orderAmount(order.getAmount())
                .orderTime(order.getOrderTime())
                .build();
        
        return orderSubmitVO;
    }
    
    
    /**
     * 订单支付
     *
     * @param ordersPaymentDTO
     * @return
     */
    
    public OrderPaymentVO payment(OrdersPaymentDTO ordersPaymentDTO) throws Exception {
        
        
        // 当前登录用户id
        
        Long userId = BaseContext.getCurrentId();
        
        User user = userMapper.getById(userId);
        
        
        //调用微信支付接口，生成预支付交易单

//    JSONObject jsonObject = weChatPayUtil.pay(

//        ordersPaymentDTO.getOrderNumber(), //商户订单号

//        new BigDecimal(0.01), //支付金额，单位 元

//        "苍穹外卖订单", //商品描述

//        user.getOpenid() //微信用户的openid

//    );

//

//    if (jsonObject.getString("code") != null && jsonObject.getString("code").equals("ORDERPAID")) {

//  throw new OrderBusinessException("该订单已支付");

//    }
        
        
        JSONObject jsonObject = new JSONObject();
        
        jsonObject.put("code", "ORDERPAID");
        OrderPaymentVO vo = jsonObject.toJavaObject(OrderPaymentVO.class);
        
        vo.setPackageStr(jsonObject.getString("package"));
        
        
        //为替代微信支付成功后的数据库订单状态更新，多定义一个方法进行修改
        
        Integer OrderPaidStatus = Orders.PAID; //支付状态，已支付
        
        Integer OrderStatus = Orders.TO_BE_CONFIRMED;  //订单状态，待接单
        
        
        //发现没有将支付时间 check_out属性赋值，所以在这里更新
        
        LocalDateTime check_out_time = LocalDateTime.now();
        
        String orderNumber = ordersPaymentDTO.getOrderNumber();
        orderMapper.updateStatus(OrderStatus, OrderPaidStatus, check_out_time, orderNumber);
        
        // 用户支付成功后，利用websocket进行通知商家
        Map map = new HashMap<>();
        map.put("type", 1);
        map.put("orderId", BaseContext.getCurrentId());
        map.put("content", "订单号" + ordersPaymentDTO.getOrderNumber());
        String json = JSON.toJSONString(map);
        webSocketServer.sendToAllClient(json);
        
        return vo;
        
    }
    
    /**
     * 支付成功，修改订单状态
     * @param outTradeNo
     */
    @Override
    public void paySuccess(String outTradeNo) {
        
        // 根据订单号查询订单
        Orders ordersDB = orderMapper.getByNumber(outTradeNo);
        
        // 根据订单id更新订单的状态、支付方式、支付状态、结账时间
        Orders orders = Orders.builder()
                .id(ordersDB.getId())
                .status(Orders.TO_BE_CONFIRMED)
                .payStatus(Orders.PAID)
                .checkoutTime(LocalDateTime.now())
                .build();
        
        orderMapper.update(orders);
        
    }
    
    /**
     * 历史订单查询
     *
     * @param pageNum
     * @param pageSize
     * @param status
     * @return
     */
    @Override
    public PageResult pageQuery4User(int pageNum, int pageSize, Integer status) {
        // 设置分页
        PageHelper.startPage(pageNum, pageSize);
        // 封装查询历史订单的的DTO对象
        OrdersPageQueryDTO ordersPageQueryDTO = new OrdersPageQueryDTO();
        ordersPageQueryDTO.setUserId(BaseContext.getCurrentId());
        ordersPageQueryDTO.setStatus(status);
        
        // 分页条件查询
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        List<OrderVO> list = new ArrayList<>();
        if (page != null && page.getTotal() > 0) {
            // 代表有订单数据，但没有订单明细数据
            for (Orders orders : page) {
                Long orderId = orders.getId();
                List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orderId);
                // 构建vo对象，装到PageResult中
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                orderVO.setOrderDetailList(orderDetailList);
                System.out.println(orderVO + "orderVo");
                list.add(orderVO);
                
            }
        }
        return new PageResult(page.getTotal(), list);
    }
    
    /**
     * 查询订单详情
     *
     * @param id
     * @return
     */
    @Override
    public OrderVO details(Long id) {
        // 像这种查询订单信息，一般都是要获取该用户id，查自己的订单
        Orders orders = orderMapper.getById(id);
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        // 封装vo对象进行返回
        OrderVO orderVO = new OrderVO();
        BeanUtils.copyProperties(orders, orderVO);
        orderVO.setOrderDetailList(orderDetailList);
        return orderVO;
    }
    
    /**
     * 用户取消订单
     *
     * @param id
     */
    @Override
    public void userCancelById(Long id) throws Exception {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_NOT_FOUND);
        }
        
        //订单状态 1待付款 2待接单 3已接单 4派送中 5已完成 6已取消
        // 这里为啥大于2呢? 2不是待接单吗，因为待接单状态说明用户已经付款了，不能取消订单，只能打电话告诉商家
        if (ordersDB.getStatus() > 2) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        
        // 封装订单更新订单的数据
        Orders orders = new Orders();
        // 更新那个订单id
        orders.setId(ordersDB.getId());
        if (ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
//            //调用微信支付退款接口
//            weChatPayUtil.refund(
//                    ordersDB.getNumber(), //商户订单号
//                    ordersDB.getNumber(), //商户退款单号
//                    new BigDecimal("0.01"),//退款金额，单位 元
//                    new BigDecimal("0.01"));//原订单金额
            
            //支付状态修改为 退款
            orders.setPayStatus(Orders.REFUND);
        }
        
        // 更新订单状态、取消原因、取消时间
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason("用户取消");
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    
    
    /**
     * 再来一单
     *
     * @param id
     */
    @Override
    public void repetition(Long id) {
        // 查询当前用户id
        Long userId = BaseContext.getCurrentId();
        
        // 根据订单id查询当前订单详情  前端传过来的订单id
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(id);
        
        // TODO  明天记得来复盘stream
        // 将订单详情对象转换为购物车对象
        List<ShoppingCart> shoppingCartList = orderDetailList.stream().map(x -> {
            ShoppingCart shoppingCart = new ShoppingCart();
            
            // 将原订单详情里面的菜品信息重新复制到购物车对象中
            BeanUtils.copyProperties(x, shoppingCart, "id");
            shoppingCart.setUserId(userId);
            shoppingCart.setCreateTime(LocalDateTime.now());
            
            return shoppingCart;
        }).collect(Collectors.toList());
        
        // 将购物车对象批量添加到数据库
        shoppingCartMapper.insertBatch(shoppingCartList);
        
    }
    
    /**
     * 订单搜索加分页
     *
     * @param ordersPageQueryDTO
     * @return
     */
    @Override
    public PageResult conditionSearch(OrdersPageQueryDTO ordersPageQueryDTO) {
        
        PageHelper.startPage(ordersPageQueryDTO.getPage(), ordersPageQueryDTO.getPageSize());
        Page<Orders> page = orderMapper.pageQuery(ordersPageQueryDTO);
        // 部分订单状态，需要额外返回订单菜品信息，将Orders转化为OrderVO
        List<OrderVO> orderVOList = getOrderVOList(page);
        
        return new PageResult(page.getTotal(), orderVOList);
    }
    
    
    /**
     * 各个订单状态的数量统计
     *
     * @return
     */
    @Override
    public OrderStatisticsVO statistics() {
        // 根据状态，分别查询出待接单、待派送、派送中的订单数量
        Integer toBeConfirmed = orderMapper.countStatus(Orders.TO_BE_CONFIRMED);
        Integer confirmed = orderMapper.countStatus(Orders.CONFIRMED);
        Integer deliveryInProgress = orderMapper.countStatus(Orders.DELIVERY_IN_PROGRESS);
        OrderStatisticsVO orderStatisticsVO = new OrderStatisticsVO();
        orderStatisticsVO.setConfirmed(confirmed);
        orderStatisticsVO.setToBeConfirmed(toBeConfirmed);
        orderStatisticsVO.setDeliveryInProgress(deliveryInProgress);
        return orderStatisticsVO;
    }
    
    
    /**
     * 商家接单
     *
     * @param ordersConfirmDTO
     */
    @Override
    public void confirm(OrdersConfirmDTO ordersConfirmDTO) {
        Orders orders = Orders.builder()
                .id(ordersConfirmDTO.getId())
                .status(Orders.CONFIRMED)
                .build();
        orderMapper.update(orders);
    }
    
    
    /**
     * 拒单
     *
     * @param ordersRejectionDTO
     */
    @Override
    public void rejection(OrdersRejectionDTO ordersRejectionDTO) throws Exception {
        // 先获取该订单信息，查出订单状态
        Orders ordersDB = orderMapper.getById(ordersRejectionDTO.getId());
        // 订单只有存在并且订单状态为2（待接单）才可以拒单
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.TO_BE_CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        
        // 还要判断用户是否已经付款，判断支付状态，支付了就要退款
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == Orders.PAID) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            log.info("退款");
        }
        // 更新订单表中的信息
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setRejectionReason(ordersRejectionDTO.getRejectionReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
    }
    
    
    /**
     * 取消订单
     *
     * @param ordersCancelDTO
     */
    @Override
    public void cancel(OrdersCancelDTO ordersCancelDTO) {
        // 获取订单信息
        Orders ordersDB = orderMapper.getById(ordersCancelDTO.getId());
        Integer payStatus = ordersDB.getPayStatus();
        if (payStatus == 1) {
//            //用户已支付，需要退款
//            String refund = weChatPayUtil.refund(
//                    ordersDB.getNumber(),
//                    ordersDB.getNumber(),
//                    new BigDecimal(0.01),
//                    new BigDecimal(0.01));
//            log.info("申请退款：{}", refund);
            log.info("申请退款");
        }
        
        // 封装orders进行更新
        Orders orders = new Orders();
        orders.setId(ordersCancelDTO.getId());
        orders.setStatus(Orders.CANCELLED);
        orders.setCancelReason(ordersCancelDTO.getCancelReason());
        orders.setCancelTime(LocalDateTime.now());
        orderMapper.update(orders);
        
    }
    
    /**
     * 派送订单
     *
     * @param id
     */
    @Override
    public void delivery(Long id) {
        Orders ordersDB = orderMapper.getById(id);
        Integer status = ordersDB.getStatus();
        if (ordersDB == null || !status.equals(Orders.CONFIRMED)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        
        Orders orders = new Orders();
        orders.setId(id);
        // 更新订单状态为派送中
        orders.setStatus(Orders.DELIVERY_IN_PROGRESS);
        orderMapper.update(orders);
    }
    
    /**
     * 完成订单
     *
     * @param id
     */
    public void complete(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        
        // 校验订单是否存在，并且状态为4
        if (ordersDB == null || !ordersDB.getStatus().equals(Orders.DELIVERY_IN_PROGRESS)) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        
        Orders orders = new Orders();
        orders.setId(ordersDB.getId());
        // 更新订单状态,状态转为完成
        orders.setStatus(Orders.COMPLETED);
        orders.setDeliveryTime(LocalDateTime.now());
        
        orderMapper.update(orders);
    }
    
    /**
     * 客户催单
     * @param id
     */
    @Override
    public void reminder(Long id) {
        // 根据id查询订单
        Orders ordersDB = orderMapper.getById(id);
        
        // 校验订单是否存在
        if (ordersDB == null) {
            throw new OrderBusinessException(MessageConstant.ORDER_STATUS_ERROR);
        }
        Map map = new HashMap();
        map.put("type",2);
        map.put("orderId",id);
        map.put("content","订单号："+ordersDB.getNumber());
        webSocketServer.sendToAllClient(JSON.toJSONString(map));
    }
    
    /**
     * 需要返回订单菜品信息的函数
     *
     * @param page
     * @return
     */
    private List<OrderVO> getOrderVOList(Page<Orders> page) {
        List<OrderVO> orderVOList = new ArrayList<>();
        // 拿到我们的分页信息条数
        List<Orders> ordersList = page.getResult();
        if (ordersList != null && !ordersList.isEmpty()) {
            for (Orders orders : ordersList) {
                OrderVO orderVO = new OrderVO();
                BeanUtils.copyProperties(orders, orderVO);
                // 在获取菜品信息
                String orderDishes = getOrderDishesStr(orders);
                orderVO.setOrderDishes(orderDishes);
                orderVOList.add(orderVO);
                
            }
        }
        return orderVOList;
    }
    
    /**
     * 根据订单id获取菜品信息字符串
     *
     * @param orders
     * @return
     */
    private String getOrderDishesStr(Orders orders) {
        // 查询订单菜品详情信息（订单中的菜品和数量）
        List<OrderDetail> orderDetailList = orderDetailMapper.getByOrderId(orders.getId());
        
        // 将每一条订单菜品信息拼接为字符串（格式：宫保鸡丁*3；）
        List<String> orderDishList = orderDetailList.stream().map(x -> {
            String orderDish = x.getName() + "*" + x.getNumber() + ";";
            return orderDish;
        }).collect(Collectors.toList());
        
        // 将该订单对应的所有菜品信息拼接在一起
        return String.join("", orderDishList);
    }
}

